Today we're discussing the impact of urban green spaces. A recent study in Melbourne found that parks reduce local temperatures by up to 4 degrees Celsius during heatwaves. However, this effect is strongest when the park area exceeds 2 hectares and includes a mix of trees and water features. Interestingly, the cooling benefit extends only about 100 meters beyond the park boundary. The researchers also noted that maintenance costs are often underestimated, especially for irrigation and pruning. They recommend prioritizing small, well-connected green corridors over a single large park, as they provide better access for residents and wildlife alike.
❓ Согласно лекции, какое условие делает городские парки наиболее эффективными для охлаждения?
A. Парк площадью более 2 гектаров с деревьями и водоёмом.
B. Парк, расположенный в пределах 100 метров от жилых районов
C. Парк с одной большой лужайкой и без деревьев.
D. Парк, который поддерживается при минимальном орошении.
✅ 正确答案
A park larger than 2 hectares with both trees and water